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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Timer */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_timer.h"
#ifdef TX_ENABLE_EVENT_TRACE
#include "tx_trace.h"
#endif
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_timer_activate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function activates the specified application timer. */
/* */
/* INPUT */
/* */
/* timer_ptr Pointer to timer control block */
/* */
/* OUTPUT */
/* */
/* TX_SUCCESS Always returns success */
/* */
/* CALLS */
/* */
/* _tx_timer_system_activate Actual timer activation function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _tx_timer_activate(TX_TIMER *timer_ptr)
{
TX_INTERRUPT_SAVE_AREA
UINT status;
/* Disable interrupts to put the timer on the created list. */
TX_DISABLE
#ifdef TX_ENABLE_EVENT_TRACE
/* If trace is enabled, insert this event into the trace buffer. */
TX_TRACE_IN_LINE_INSERT(TX_TRACE_TIMER_ACTIVATE, timer_ptr, 0, 0, 0, TX_TRACE_TIMER_EVENTS)
#endif
#ifdef TX_ENABLE_EVENT_LOGGING
/* Log this kernel call. */
TX_EL_TIMER_ACTIVATE_INSERT
#endif
/* Check for an already active timer. */
if (timer_ptr -> tx_timer_internal.tx_timer_internal_list_head != TX_NULL)
{
/* Timer is already active, return an error. */
status = TX_ACTIVATE_ERROR;
}
/* Check for a timer with a zero expiration. */
else if (timer_ptr -> tx_timer_internal.tx_timer_internal_remaining_ticks == ((ULONG) 0))
{
/* Timer is being activated with a zero expiration. */
status = TX_ACTIVATE_ERROR;
}
else
{
#ifdef TX_TIMER_ENABLE_PERFORMANCE_INFO
/* Increment the total activations counter. */
_tx_timer_performance_activate_count++;
/* Increment the number of activations on this timer. */
timer_ptr -> tx_timer_performance_activate_count++;
#endif
/* Call actual activation function. */
_tx_timer_system_activate(&(timer_ptr -> tx_timer_internal));
/* Return a successful status. */
status = TX_SUCCESS;
}
/* Restore interrupts. */
TX_RESTORE
/* Return completion status. */
return(status);
}